Tool guiding fixture



Dec. 10, 1946. R. c. KIVLEY I TOOL GUIDING FIXTURE 2 SheetsSheet 1 mmvrm ff. 6'. K/vu'r Filed NOV. 6, 1943 L'S-JZYILF Patented Dec. 10, 1946 TOOL GUIDING FIXTURE Ray C. Kivley, Oak Park, Ill., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York.

Application November 6, 1943, Serial No. 509,165

4 Claims.

This invention relates to tool guidingfixtures and more particularly to a combined template and tool jig.

An object of the present invention is the provision of a practicable combined template and tool jig for facilitating the locating of points to be worked in a face of a part in definite and uniform relation to the contour of the part so that the contours of similar parts, likewise worked, will be accurately aligned when secured together.

In accordance with the above object, in one embodiment of the invention, particularly designed for use in drilling apertures in flanges of tubular parts of rectangular contour, there is provided a template, which rests on the part and has apertures corresponding in arrangement to the apertures to be drilled. Dependin centrally from the template and freely receivable in the bore of the part is an extension in which is slidably carried a plurality of sets of positioning and clamping pins arranged to engage angularly disposed faces at each corner of the bore, one set of pins being in a different vertical plane than the other sets of pins and the pins of each set being movable in opposite directions. Each set of pins is simultaneously advanced outwardly by a spring-actuated cam member individual thereto, which permits the various sets of pins to move different distances, the cam members being simultaneously withdrawn and/or released by a common control member actuated from a point above the template. The pins are retracted from the faces of the bore upon withdrawal of the cam members by individual springs connected to each set thereof. Thus, by releasing the spring-actuated cam members, the sets of pins are simultaneously advanced to engage the faces of the bore of the part and due to the resultant equalizing action set up between the sets of pins, the template is centered with the bore and the jig clamped to the part.

Other objects and advantages of this invention will more fully appear from the following detailed description, taken in conjunction with the accompanying drawings, in which Fig. 1 is a fragmentary plan View of a combined template and drill jig embodying the features of the invention;

Fig. 2 is a central longitudinal vertical section taken on the line 2-2 of Fig. 1 showing the jig in operative position upon a part to be drilled;

} Fig. 3 is a vertical irregular section taken on the line 33 of Fig. 1; and

Figs. 4 and 5 are plan sections taken on the lines 4-4 and 5-5, respectively, of Fig. 2.

Referring to the drawings, particularly to Figs. 2 and 3, a template of rectangular contour is indicated at 10 having an integral depending centralized portion H, the template being used in drilling a series of apertures in an outer end face of a flange l2 of a tubular part I3 of rectangular cross section, which is indicated fragmentarily in broken outline. In the use of such tubular parts L3, which are abutted at their drilled flanges and secured by bolts, it is essential that, in some applications thereof, the inner contours of the parts formed by the walls l4 should be accurately and micrometrically aligned. Therefore, it is necessary that the drilled flange apertures of each part should have a definite and uniform relation to the inner contour thereof. Formed in the template ID are a series of apertures, in which are drive-fitted hardened bushings I! which serve to guide drills, one of which is shown frag mentarily in broken outline at l8 (Fig. 3), into engagement with the flange during the drilling operation. After the template I0 is accurately positioned upon the flange l2 and clamped to the part l3 by means carried by the template portion H, and in a manner which will now be described, the points of the flange l2 to be drilled are definitely located relative to the inner contour of the part.

Longitudinally slidable in Vertical apertures i 9, 29 and 2| formed in the template in and depending portion II are cam members 24, 25 and 26, which are centrally arranged in a row extending longitudinally of the template. Intermediate their ends the cam members are notched upon opposite sides to provide inclined cam faces 21,

the cam faces of the member 24 being at a lower level than the cam faces of the members 25 and 26 and disposed .therefrom to face the narrower inner end walls I4 of the tubular plate It while the cam faces 21 of the members 25 and 26 face the longer walls thereof (Fig. 4). Engaging each of the cam faces 2'! of the members 25 and 26 are template positioning and clamping pins 28 and engaging the cam faces 2'! of the member 24 are pins 3| for a similar purpose, the pins at their inner end faces being inclined to match the inclined cam faces. The pins 28 and 3| are slidable in suitably arranged apertures 32 in the template l0 and its depending'portion II and the pins 3| extend freely through elongated apertures 33 (Figs. 2 and 3) in the cam mem-' bers 25 and 26 so that each cam member may actuate its associated pins without interference. Operatively connected to each pair of pins 28v and SI is a U-shaped spring 34, having inclined opposite arms entered in suitable depressions in the pins, the springs being constantly effective to maintain the pins in engagement with the cam faces 21 of the members 24, 25 and 26. At their upper ends, the apertures I9, 20 and 2I are suitably enlarged, as indicated at 35 (Fig. 3) and apertures 38 are provided in the template I and its depending portion II for the mounting of the springs 34. The cam members 24, 25 and 26 are slotted at 39 for receiving the springs 34.

Each of the cam members 24, 25 and 26 is normally individually urged upwardly t0 cam their associated pins 28 and 3| outwardly to their operative positions, as shown (Figs. 2, 3 and 4), with their outer end faces engaging the walls I4 of the tubular part I-3 by compression springs 4|], the springs being retained at opposite ends in depressions in the cam members and in depressions in a plate 4i secured to the bottom face of the depending portion II of the template. To effect a withdrawal of the pins 28 and 3| from the walls I4, the cam members 24, 2 5 and 26 are moved downwardly by a rotatable multipIeecCentric member 42 journalled in a box 45 attached to the upper face of the template III, a handle 46 fixed to an end of the eccentric member providing means for rotating the member. The member 42 is formed with three similar and aligned eccentric portions 4'! arranged above the upper end faces of the cam members 24, 25 and 26. With the handle 46 in the position shown in Fig. 3, the eccentric portions 41 have been rotated to their upper positions and are out of contact with the end faces of the spring advanced cam members 24, 25 and 2B. To lower the cam members 24, 25 and 26, the handle 46 is merely rocked from the left to the right hand side of the box 45,, whereupon the eccentric portions 41 engage the cam members and simultaneously cam them downwardly and, as the cam faces 21 move downwardly, the engaged positioning and clamping pins 28 and 3| are simultaneously drawn inwardly from the walls I4 of the part I3 by the action of the springs 34 until their outer end faces lie substantially flush with the outer vertical faces of the depending portion II- of the template I0.

In the use of the combined template and drill jig above described, and assuming that the handle ,46 is at the right hand side of the box 45 with the positioning and clamping pins 28 and 3| in their retracted position, as last described, the jig is mounted on the flange I2 of a tubular part I3 and the handle is rotated to the left hand side of the box 45, as shown in Fig. 3. This last movement of the handle 46 simultaneously releases the spring-actuated cam members 24, 25 and 2B and, as they move upwardly, each cams outwardly its associated pair of pins 28 and 3|, each pair of pins being simultaneously advanced to engage the walls I4 of the part l3 and, depending .on the inner contour of the tubular part I3, may move varying distances, the associated pins of each pair advancing a similar distance. Any variation in the distance advanced between the various pairs of pins will be micrometric, but due to the resultant equalizing action set up between the pairs of pins, the temp ate I I), which is free to move on the flange I2 of the tubular part I3, will be centered relative to the inner contour of the part determined by the relative positions of the Walls I4 andclamped thereto by the action of the spring-actuated cam members and 2.6 p si g ou wardl upon the pins 28 and 3|. As thus positioned and clamped on the flange I2 of the part I3, drills, such as indicated at I8, may be guided into the bushings I! carried in the template II] to form apertures in the flange in definite and uniform relation to the inner contour of the part. Thus, when similar parts I3 are drilled in a like manner with the use 9f the template II), the inner walls I4 Will be accurately aligned when secured together by bolts entered in the drilled apertures.

It will be understood that the embodiment herein described is merely illustrative of the invention and one application thereof and that modifications can be made and it is capable of other applications.

What is claimed is:

1. A combined template and drill jig for use in locating points to be drilled in an end face of a tubular part relative to the bore thereof comprising a template for mounting on an end face of a part, said template having apertures corresponding in arrangement to the points to be drilled, means depending from said template adapted to freely enter the bore of the part, a plurality of sets of elements movable on said means to engage angularly disposed faces of the bore, an individual member for moving each set of elements, said members being laterally spaced apart and movable simultaneously in the same direction, and means including a common actuator for simultaneously moving said members and thereby said elements of each set like distances effective to predeterminedly position the jig relative to the faces of the bore and clamp the same to the part.

2. A combined template and drill jig for use in locating points to be drilled in an end face of a tubular part relative to the bore thereof comprising a template for engaging an end face of a part, said template having apertures corresponding in arrangement to the points of drilling, a plurality of positioning and clamping pins reciprocably carried on said template for freely entering the bore of the part, said pins being arranged in sets for engaging angularly disposed faces of the bore, individual spring actuated cams arranged to directly engage and advance each set of pins, and a common control member effective to simultaneously release said cams to permit said set of pins, upon being advanced, to centralize the jig relative to the bore and clamp the the same to the part.

3. A combined template and drill jig for guiding a drill toward a part to be drilled comprising a body for engaging a face of a part, said body having apertures corresponding in arrangement to the points of drilling, a plurality of spring retracted jig-positioning members carried by said body arranged in pairs for engaging different angularly disposed faces of the part to be drilled, an individual plunger for simultaneously actuating each pair of said members, rotary cam means individual to each of said plunger-s for simultaneously positively withdrawing said plungers from their actuated positions and for releasing the same, a common actuator for said rotary cam means, and a spring individual to each plunger for actuating the same whereby each plunger and its associated pair of members may be moved varyin distances and their combined movements equalized in accordance with the shape of the part to be drilled.

4. A combined template and drill jig for guiding a drill toward an end face of a tubular part to be drilled at points definitely and uniformly related to the bore contour of the part compris- 0.] ing a template for mounting on an end face of the part, said template having apertures corresponding in arrangement to the points of drilling, a portion depending from and centralized with said template arranged to freely enter the bore of the part, a plurality of members carried in said portion and arranged in pairs for engaging angularly disposed faces of the bore, an individual cam-faced plunger for simultaneously actuating the members of each pair, means com- 10 

